Practice makes perfect.
A proposal is a formal plan or suggestion that a group has to consider. When you take CPE and write a proposal during the test's writing part, you must remember the 5 criteria according to which your work is going to be assessed...
If you use the vocabulary the post aims to teach you, and, most importantly, if you do it right, you will definitely show how highly proficient you are in English. All the vocabulary is taken from CPE practice tests.
We hope this post will help you prepare by providing 2 questions which can be found in the test and the answers to these questions.